Question: Planted bed of petunias. Half started failing by looking very dry even though watered daily. Bit by bit one side of the square bed is dying one by one. I tried replacing them and no luck. Within a day or so they die. Put down a grub killer and have sprayed the whole bed for insects. But whatever the problem, it is marching up and down one side and I am afraid it will spread. Roots seem okay.
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